Kuberenets cluster recipe not happy

olivierlambert

Please do NOT use XCP-ng Center "snapshot schedule" feature please

mathiashedberg

@olivierlambert For a homelab setup this is currently the only "free" solution to snapshotting that i know of (other than file system based like ZFS).

Going from "free" to 77USD a month is quite a jump imo.

olivierlambert

It's a bit off topic but:

Remember, snapshot is not backup
You can use XO from the sources to have all XO source code without feature restrictions (but XO hub/recipe is XOA because it's a service connected on xen-orchestra.com where we host the machines).

Anyway, let's try to find the original problem

DustinB

@mathiashedberg said in Kuberenets cluster recipe not happy:

@olivierlambert For a homelab setup this is currently the only "free" solution to snapshotting that i know of (other than file system based like ZFS).

Going from "free" to 77USD a month is quite a jump imo.

Xen Orchestra is free and open source. You can follow the build from source instructions or use a script like the one posted to my github

mathiashedberg

@olivierlambert
The snapshot functionality is still quite tempting to use, as I have not had any issues with it before now. I'll admit I'm not too up to date on what features are recommended or not when it comes to XCP-NG.

@DustinB I think its great that we have such useful software that is free and open source. If my comment came off as negative I apologize, that was not my intention.

Moving forward I would assume that removing all my snapshots would remedy the issue. However I'm not too sure on how keen I am on doing that right at this moment with my current setup, maybe on a different test lab.

BenjiReis

@mathiashedberg the snaphots might be indeed the problem.

When looking for the template, the recipe looks for a VM with xo:resource:xva:id=<template uuid> in its other-config, a snapshot of the template VM would probably have this field se and it should not.

Can you check if it's the case? and if the is-template field is true.

olivierlambert

That's an interesting thing. I think it might be a potential bug because of XenCenter snapshot algorithm that handle is-template differently than XO.

BenjiReis

@olivierlambert should I also check that is-a-snapshot is false?

olivierlambert

Double check what do you have when we install a template from XO Hub. If is-a-snapshot is at false, then yes, add this condition. We should use the installed template, not anything else.

BenjiReis

Okay so a fix is coming soon, i'll update here once released.

mathiashedberg

@benjireis
So you are correct on all those points. Here are the relevant params from the snapshot that was being used:

is-a-template ( RW): true
is-a-snapshot ( RO): true
other-config (MRW): auto_poweron: false; xo:resource:xva:id: a677aa91-f5d5-46ec-bd53-956b73fc7871; xo:resource:namespace: Debian10; xo:resource:xva:version: 1.0.0; import_task: OpaqueRef:71bd99c2-11c3-4306-a5b9-7fe6e86f551b; mac_seed: 02166646-6e3b-de07-1b11-872d538d3f01; base_template_name: Debian Stretch 9.0; install-methods: cdrom,nfs,http,ftp; linux_template: true

BenjiReis

@mathiashedberg good to know.

So you can wait for the fix or remove the xo:resource:xva:id from the other_configs of the snapshots or remove the snapshots

mathiashedberg

@benjireis Looks like version 5.56.0 runs as expected! No issues so far!

olivierlambert

Thanks for the feedback @mathiashedberg !